Pittsburg, Pa., April 3. - Vice President Penna and Executive Committeeman Hays. of the United Mine workers, arrived in tliis city last night and went into conference with members of the order. Mr. Penua, in speakiug of what he learned at the scène of the riot, said: "When our evidence is developed Americans will btand aghast. Personal spite is responsible ior the occurrence. In the coke región the men go to work early. The marching about of the strikers is to strenethen weak-kneed ones and for the moral effect on non-union men. It would be useless for the strikers to marcii about after the men had gons into the mines. In my opinión the men had no iutention of coinmitting any overt act. Got a Dozen on the List. James McBride, secretary of the district, and Robert Waddell, of the strikers' committee, swore out warrants against the following: For murder- Capt. J. A. Loar, Kichard Burns, J. A. Zundla, L. S. Davis. Harry Wilson, Lon Brown, Harry Gilbert, - Berger, Edward Sieman, George Carbaugh, Miles Hatnm, Elmer Kicliit, mi accesMirie - Thomas Lynch, general manager of the Frick compnnr, and Morris Ramsey, superintendent. Several of the warrnnts have ben served and each man arresteil lins giveii bail fora hearing. Milles Hamm denies that he was in the fight, and has witnesses to prove this. A Totiil of Ten Killed. The latest report place the uumber o( persons injured in tlie riot at fiftj', thrco i of wlioin (names unknown) have since died, making a total of ten dead.